Teac PL-D200V Service Manual page 94

LC75725E (VFD DRIVER : IC74)
BLOCK DIAGRAM
BLK
V
OSCI
OSCO
PIN ASSIGNMENTS
(TOP VIEW)
.......
DIGIT
DRIVER
FL
TIMING
GENERATOR
DIVIDER
CLOCK
GENERATOR
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
S8 49
S7 50
S6 51
S5 52
S4 53
S3 44
S2 55
S1 56
V 57
SS
OSCO 58
OSCI 59
V 60
DD
61
BLK
CE 62
63
CL
64
DI
1 2 3
..............................................
SEGMENT DRIVER
DIMMER
GRID
TIMING
CONTROL
GENERATOR
SHIFT REGISTER
LC75725E
4 5 6 7 8 9 10 11 12 13 14 15 16
MPX
LATCH
ADDRESS
DETECTOR
32 S25
31 S26
30 S27
29 S28
28 S29
27 S30
26 S31
25 S32
24 S33
23 S34
22 S35
21 S26
20 S36
19 S37
18 S38
17 S39
109